CN205812425U - A kind of kitchen appliance surge protection circuit - Google Patents
A kind of kitchen appliance surge protection circuit Download PDFInfo
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- CN205812425U CN205812425U CN201620352865.9U CN201620352865U CN205812425U CN 205812425 U CN205812425 U CN 205812425U CN 201620352865 U CN201620352865 U CN 201620352865U CN 205812425 U CN205812425 U CN 205812425U
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Abstract
The utility model discloses a kind of kitchen appliance surge protection circuit, belong to household appliance technical field, solve existing kitchen appliance surge protection circuit and protect the problem causing circuit Important Components to damage not in time, kitchen appliance surge protection circuit of the present utility model includes controller, connect the IGBT module of controller and connect the rectification module of IGBT module, described surge protection circuit also includes the first surge absoption module for absorbing surge disturbing signal, described first surge absoption module is connected between rectification module and IGBT module, surge absoption is carried out with the voltage that described rectification module is exported.This utility model embodiment is applied to electromagnetic oven, electromagnetic stove, IH electric cooker, IH pressure cooker and other similar cooking apparatus.
Description
[technical field]
This utility model relates to household appliance technical field, particularly relates to a kind of kitchen appliance surge protection circuit.
[background technology]
Kitchen appliance in use can be frequently encountered by surge impact, and this surge impact derives from line voltage ripple
The fluctuation etc. that dynamic, the access of other electrical equipment brings, causes this kitchen appliance normally to work.Surge is also surging, Gu Mingsi
Justice is exactly the abrupt transients of normal working voltage, and essentially, surge is to occur at Microsecond grade to the one in the Millisecond time
Potential pulse, surge there is a possibility that circuit moment burns out, and causes the damage of its parts, and generation such as capacitance of PN junction punctures, resistance
The phenomenon such as blow, and surge protection circuit utilizes the non-linear element protection circuit to the sensitive design of high frequency (surge) exactly.
The effect of the existing surge protection circuit being applied to electromagnetic oven is in electromagnetic oven work process, when external electrical network goes out
During existing various abnormal surging signal, by electrical network surge voltage signal is acquired, the signal collected is joined with comparator
Examining voltage to compare, controller controls IGBT drive module according to comparative result and cuts out or conducting IGBT, thus reaches surge
The purpose of protection.But being as increasing of electrical equipment kind and quantity, electrical network interference is day by day serious, this surge protection to electromagnetic oven
Design is had higher requirement, and the surge protection circuit of existing routine cannot meet this requirement, surge protection easily occurs
Cause the components and parts punch through damage such as IGBT not in time.Preventing swell damage is the weight being related to kitchen appliance safe and reliable operation
Want problem, it is therefore necessary to existing surge protection circuit is made improvement, to meet higher surge protection requirement.
[utility model content]
Technical problem to be solved in the utility model is to overcome the deficiencies in the prior art to provide a kind of kitchen appliance
Surge protection circuit, provides surge protection more stable, reliable for kitchen appliance.
Solving above-mentioned technical problem, this utility model adopts the following technical scheme that
A kind of kitchen appliance surge protection circuit, the IGBT module including controller, connecting controller and connection IGBT mould
The rectification module of block, described surge protection circuit also includes the first surge absoption module for absorbing surge disturbing signal, institute
State the first surge absoption module to be connected between rectification module and IGBT module, carry out with the voltage that described rectification module is exported
Surge absoption.
Further scheme, described first surge absoption module includes a varistor；Or described first surge is inhaled
Receive module and include the varistor of multiple series connection；Or described first surge absoption module includes the varistor of multiple parallel connection.
Further scheme, described surge protection circuit also includes that the first filtration module, described first filtration module include
LC filter unit, the input of described LC filter unit connects the outfan of the first surge absoption module, for the first surge
The voltage of absorption module output is filtered.
Further scheme, described kitchen appliance surge protection circuit also includes for absorbing voltage surge disturbing signal
Second surge absoption module, the outfan of described second surge absoption module connects the input of rectification module.
Further scheme, described second surge absoption module includes varistor；Or described second surge absoption
Module includes varistor and strengthens the discharge tube of surge absoption function, and described varistor and discharge tube are connected in series.
Further scheme, described kitchen appliance surge protection circuit also includes the second filtration module, described second filter
The outfan of mode block connects the input of the second surge absoption module, for the smooth electricity being input to the second surge absoption module
Pressure.
Further scheme, described kitchen appliance surge protection circuit also includes for current signal and/or voltage signal
Sampling surge sampling module, described controller according to sampling current signal and/or voltage signal to IGBT module regulation with
Carry out surge protection.
Further scheme, described surge sampling module includes the voltage surge sampling module for voltage sample and use
In the current surge sampling module of current sample, the sampling input of described voltage surge sampling module connects the defeated of rectification module
Entering end, described current surge sampling module connects the outfan of rectification module.
Further scheme, described surge sampling module includes voltage surge sampling module, and described voltage surge is sampled
Module is provided with the Half bridge rectifier unit being connected with rectification module input.
Further scheme, described Half bridge rectifier unit at least includes a diode, and described diode is the most extensive
Multiple diode.
The beneficial effects of the utility model:
Kitchen appliance surge protection circuit of the present utility model, is provided for absorbing the first wave of voltage surge disturbing signal
Gushing absorption module, this first surge absoption module is connected between rectification module and IGBT module, with export rectification module
Voltage carries out surge absoption.When there is surge disturbing signal (including voltage surge and current surge) in power grid environment, the first wave
Gush absorption module and carry out surge absoption, reduce the impact on late-class circuit of the voltage surge disturbing signal as far as possible, as this practicality is new
IGBT module described in type, makes IGBT module work in a comparatively safe voltage range, reduces IGBT module by voltage
The probability that surge disturbing signal affects and damages, IGBT module is the core component of kitchen appliance induction heating apparatus, IGBT mould
Block safe and stable operation can improve kitchen appliance functional reliability；The electric current input IGBT module of rectified module rectification, whole
Arranging the first surge absoption module between flow module and IGBT module for absorbing voltage surge disturbing signal, its assimilation effect is more
Add direct and effective, give full play to the absorption function of the first surge absoption module, thus preferably protect the IGBT module of rear class.
Described first surge absoption module includes a varistor；Or described first surge absoption module includes multiple
The varistor of series connection；Or described first surge absoption module includes the varistor of multiple parallel connection.Select a pressure-sensitive electricity
In the case of resistance, surge absoption can be realized with least cost；In the case of selecting multiple varistor in parallel or in series, permissible
Promote the absorbability of the first surge absoption module, thus more preferable surge protection is provided.
Described surge protection circuit also includes that the first filtration module, described first filtration module include LC filter unit, institute
The input stating LC filter unit connects the outfan of the first surge absoption module, for the first surge absoption module output
Voltage is filtered.As a rule, the voltage of rectification module output is not direct current purely, containing bigger pulsation in its waveform
Composition, for obtaining ideal DC voltage, utilizes the pulsation in LC filtering module for filtering off rectification module output voltage to become
Divide to obtain DC voltage.
Described kitchen appliance surge protection circuit also includes the second surge absoption for absorbing voltage surge disturbing signal
Module, the outfan of described second surge absoption module connects the input of rectification module.The setting of the second surge absoption module
On the one hand it is that input voltage is carried out surge absoption, the rectification module of protection rear class, is on the other hand to cooperate with the first surge absoption
Module, it is achieved twice surge absoption front and back, promotes the surge absoption ability of surge protection circuit further.
Second surge absoption module includes varistor；Or described second surge absoption module includes varistor and increasing
High seas are connected to L line, N line after gushing the discharge tube of absorption function, described varistor and discharge tube series connection.Select a pressure-sensitive electricity
In the case of resistance, surge absoption can be realized with least cost；In the case of selecting varistor and discharge tube series connection, discharge tube can
To strengthen surge absoption function, this function is mainly manifested in two aspects, and one is an up the absorbability of varistor, at circuit
Make varistor turn on rapidly bleed off surge voltage when producing surge impact, promote response speed；Two are, widen varistor
Absorption region, discharge tube can provide the clamp voltage lower than single varistor with varistor after connecting, thus more preferably
Absorption surge.
Described kitchen appliance surge protection circuit also includes the second filtration module, and the outfan of described second filtration module is even
Connect the input of the second surge absoption module, be input to the voltage of the second surge absoption module, filtering clutter for smooth；Except this
Outside, the second filtration module also possesses certain surge absoption ability, thus alleviates the second surge absoption module burden, promotes wave
Gush protection reliability.
Described kitchen appliance surge protection circuit also includes sampling for the surge of current signal and/or voltage signal sampling
Module, IGBT module is regulated to carry out surge protection by described controller according to current signal and/or the voltage signal of sampling.Knot
Close surge sampling module, in the case of line voltage instability, can directly turn off the critical elements in IGBT module, with protection
Critical elements.
Described surge sampling module includes that voltage surge sampling module, described voltage surge sampling module are provided with and rectification mould
The Half bridge rectifier unit that block input connects, Half bridge rectifier unit is for being converted into DC voltage by the alternating current of input and exchange
The unidirectional pulsating nature unidirectional current of voltage mixing, in order to the sampling of voltage surge sampling module；Use fast quick-recovery two pole further
Pipe, utilizes the characteristic that its reverse recovery time is short, makes late-class circuit quickly respond, and improves sample rate, with when surge occurs
Quickly set up protection.
These features of the present utility model and advantage will be detailed in following detailed description of the invention, accompanying drawing exposure.
[accompanying drawing explanation]
Below in conjunction with the accompanying drawings this utility model is described further:
Fig. 1 is the theory diagram of surge protection circuit in this utility model embodiment one；
Fig. 2 is the circuit diagram of surge protection circuit in this utility model embodiment one；
Fig. 3 is the theory diagram of surge protection circuit in this utility model embodiment two；
Fig. 4 is the circuit diagram of surge protection circuit in this utility model embodiment two.
[detailed description of the invention]
Below in conjunction with the accompanying drawing of this utility model embodiment the technical scheme of this utility model embodiment explained and
Illustrate, but following embodiment is only preferred embodiment of the present utility model, and not all.Based on the embodiment in embodiment,
Those skilled in the art are obtained other embodiments on the premise of not making creative work, broadly fall into of the present utility model
Protection domain.
Embodiment one:
With reference to Fig. 1,2, the kitchen appliance surge protection circuit that this utility model embodiment one proposes, including controller 1, even
Connecing the IGBT module 2 of controller 1 and connect the rectification module 3 of IGBT module 2, wherein, IGBT module 2 includes that IGBT and IGBT drives
Galvanic electricity road, rectification module 3 can be the bridge rectifier that four diodes are constituted, it is also possible to be the single tube only comprising a diode
Rectification, rectification module 3 for being converted into DC voltage and the unidirectional pulsating nature unidirectional current of alternating voltage mixing by the voltage of input
Pressure exports.For using the kitchen appliance of electromagnetic induction heating, alternating magnetic field is mainly relied on to produce on pan
Eddy current, and then realize heating, and the generation of alternating magnetic field needs to rely on repeatedly opening of internal IGBT to turn off and resonance circuit
Vibration produces, and when surge occurs in electrical network, the running voltage moment of electrical equipment rises, if software section can not detect reaction in time,
To the monitoring of surge and processing the most perfect plus hardware circuit, the crest voltage being carried on IGBT is possible to beyond it resistance to
Pressure value, causes IGBT punch through damage.
To this end, the surge protection circuit of the present embodiment is provided for absorbing the first surge absoption of voltage surge disturbing signal
Module 4, this first surge absoption module 4 is connected between rectification module 3 and IGBT module 2, the voltage warp of rectification module 3 output
First surge absoption module 4 inputs described IGBT module 2 after carrying out surge absoption.It is so designed that, when voltage occurs in power grid environment
During surge disturbing signal, the first surge absoption module 4 carries out surge absoption, reduces voltage surge disturbing signal as far as possible to rear class
The impact of circuit, makes IGBT module 2 work in a comparatively safe voltage range, reduces IGBT module 2 by voltage surge
The probability that disturbing signal affects and damages, IGBT module 2 is the core component of kitchen appliance induction heating apparatus, IGBT module 2
Safe and stable operation can improve kitchen appliance functional reliability；It addition, the electric current input IGBT module 2 of rectified module 3 rectification,
Arranging the first surge absoption module 4 between rectification module 3 and IGBT module 2 for absorbing voltage surge disturbing signal, it is inhaled
Fruit of producing effects is more direct and effective, gives full play to the absorption function of the first surge absoption module 4, thus preferably protects rear class
IGBT module 2.
Preferably, the first surge absoption module 4 of the present embodiment includes two varistor CNR2 in parallel and pressure-sensitive electricity
Resistance CNR3, and by one of them sys node ground connection of the two varistor.Varistor is a kind of votage limit type protection device,
Utilize the nonlinear characteristic of varistor, when overvoltage occurs in two interpolars of varistor, and varistor can be by voltage clamp
Position is to a relatively-stationary magnitude of voltage, thus realizes the protection to late-class circuit, is specifically applied in the present embodiment, works as electrical network
When normally working, varistor is high impedance status, and varistor is not turned on；After electrical network is by surge impact, varistor
Impedance diminish, varistor turn on, make surge be released on earth terminal by varistor, i.e. play the work of surge absoption
With, and use the residual voltage given by two varistors in parallel to be far smaller than the residual voltage of single varistor, so it is unrestrained
Gush absorbability higher.Certainly, in the scheme of other suboptimums, it is contemplated that the requirement of circuit safety design and setting of circuit
Meter cost, the first surge absoption module 4 can select a varistor；Or plural varistor is arranged in parallel；
Or two and above varistor are arranged in series, these schemes all should be in protection domain of the present utility model.
Preferably, the surge protection circuit of the present embodiment also includes the first filtration module, and this first filtration module includes RC
Filter unit 5 and LC filter unit 6, RC filter unit 5 is connected to outfan and the first surge absoption module 4 of rectification module 3
Input between, for smoothing the voltage of rectification module 3 output, concrete: RC filter unit 5 includes filter capacitor C4 and putting
Electricity resistance R2, filter capacitor C4 and discharge resistance R2 are connected in parallel on the outfan of rectification module 3, by the charging of filter capacitor C4
And the electric discharge of discharge resistance R2, make the first filtration module 5 also possess certain surge absoption ability, thus alleviate rear class first
Surge absoption module 4 is born, and promotes surge protection reliability.The input of LC filter unit 6 connects the first surge absoption module 4
Outfan, for first surge absoption module 4 output voltage be filtered, LC filter unit 6 includes inductance L1 and filter
Ripple electric capacity C5, because the voltage of rectification module 3 output is not direct current purely, containing bigger ripple component in its waveform, for
Obtain ideal DC voltage, need the LC utilizing inductance L1 and the filter capacitor C5 composition with energy storage effect to filter mould
Block 6 filters the ripple component in rectification module 3 output voltage to obtain DC voltage, and then input IGBT module 2.It addition,
Inductance L1 two ends are utilized to have the advantages that electric current can not suddenly change, after electrical network is by surge impact, the inductance L1 impedance to surge
Become big, thus reduce the surge impact to late-class circuit, namely play the effect of surge protection.
It is understood that in other embodiments of the present utility model, RC filter unit can be saved, only by LC filter unit
Carry out smothing filtering；Or RC filter unit replaces all being possible with an electric capacity.
In order to provide more preferable surge protection, the surge protection circuit of the present embodiment has also added for absorbing voltage surge
Second surge absoption module 7 of disturbing signal, the outfan of this second surge absoption module 7 connects the input of rectification module 3.
On the one hand arranging of second surge absoption module 7 be that input voltage carries out surge absoption, protects the rectification module 3 of rear class, separately
On the one hand it is to cooperate with the first surge absoption module 4, it is achieved twice surge absoption front and back, promotes the wave of surge protection circuit further
Gush absorbability.Specifically: the second surge absoption module 7 of the present embodiment includes varistor CNR1 and strengthens surge absoption
It is connected to L line, N line after the discharge tube FD1 of function, varistor and discharge tube series connection.The characteristic of varistor is: when being carried in
When voltage on varistor is less than its reference voltage, the electric current flowing through it is minimum, and varistor at this moment is equivalent to one
The infinitely-great resistance of resistance, namely be equivalent to the switch of an off-state；And when the voltage being carried on varistor exceedes
During its reference voltage, the electric current flowing through it increases sharply, and varistor at this moment is equivalent to the infinitesimal resistance of resistance.Namely
Be equivalent to the switch of a closure state.Discharge tube is a kind of high voltage protective element for equipment input, at its two ends
When voltage exceeds its protection setting value, there will be short circuit phenomenon inside it, and sponge the high pressure excessively of input.According to varistor
Being understood that in the present embodiment with this characteristic of discharge tube, varistor CNR1 has bigger parasitic capacitance, often exists
Producing the leakage current that numerical value is considerable under system normal operating condition, the normal of system is often transported by the biggest leakage current
Row produces certain impact, receives L line, N line with discharge tube FD1, due to the parasitism of discharge tube after being connected by varistor CNR1
Electric capacity is the least, and the total capacitance of whole series arm can be made to reduce to microfarad range；When there is no transient overvoltage effect, discharge tube FD1
Can be opened with isolation of system by varistor CNR1, make in varistor CNR1 almost without leakage current, this just can reduce pressure-sensitive
The reference voltage of resistance CNR1, owing to the reference voltage of varistor CNR1 is relatively lowly, as long as discharge tube FD1 can be put rapidly optional
Conducting, this series arm just can provide the clamp voltage lower than single varistor, thus preferably absorbs surge.Always
For, the effect that discharge tube FD1 plays is to strengthen surge absoption function, and this function is mainly manifested in two aspects, and one is to carry
Rise the absorbability of varistor CNR1, make varistor turn on rapidly bleed off surge voltage when circuit produces surge impact,
Promote response speed；Two is the absorption region widening varistor CNR1, and discharge tube can provide ratio after connecting with varistor
The clamp voltage that single varistor is lower, thus preferably absorb surge.
Certainly, in the scheme of other suboptimums, it is contemplated that the requirement of circuit safety design and the design cost of circuit, the
Two surge absoption modules 7 can only arrange a varistor；Or the discharge tube multiple varistors of series connection；Or ginseng
Scheme according to aforementioned first surge absoption module 4 designs the second surge absoption module 7.These schemes all should be at this utility model
Protection domain in.
Preferably, the surge protection circuit of the present embodiment also includes the second filtration module 8, this second filtration module 8 defeated
Go out end and connect the input of the second surge absoption module 7, for the smooth voltage being input to the second surge absoption module 7.Specifically
For, the second filtration module 8 includes filter capacitor C1, filter capacitor C2 and is filter capacitor C1 and filter capacitor C2 electric discharge
Discharge resistance R1, filter capacitor C1, filter capacitor C2 and discharge resistance R1 are connected in parallel on the input of the second surge absoption module 7
On, by filter capacitor C1, the charging of filter capacitor C2 and the electric discharge of discharge resistance R1, make the second filtration module 8 also possess
Certain surge absoption ability, thus alleviate rear class the second surge absoption module 7 burden, promote surge protection reliability.
Embodiment two
With reference to Fig. 3,4, the present embodiment scheme based on the basis of embodiment one add surge sampling module, controller 1 basis
IGBT module 2 is regulated to carry out surge protection by sampled signal.Specifically, surge sampling module includes adopting for voltage signal
The voltage surge sampling module 9 of sample and the current surge sampling module 10 for current signal sampling, voltage surge sampling module 9
Sampling input connect rectification module 3 input, current surge sampling module 10 connects the outfan of rectification module 3.Its
In, controller 1 is internally integrated comparator 11 and IGBT and drives signal control module 12, and current surge sampling module 10 includes sampling
Resistance R5, sampling resistor R3 and pull down resistor R6, pull down resistor R6 one end is connected to power end Vcc (+5V), and divider resistance R6 is another
The sys node of one end and sampling resistor R5 is connected to the input of comparator 11, and sampling resistor R3 connects with sampling resistor R5,
Sampling resistor R3 one end is connected to the emitter stage of IGBT, and its principle is: when the systems are operating normally, and 11 pins of controller 1 are
High level, after surge current flows to sampling resistor R3, the voltage of the sys node of divider resistance R6 and sampling resistor R5 reduces,
11 pins of controller 1 collect in magnitude of voltage the input comparator 11 of this point, compare with the reference voltage of comparator 11
Relatively, when in controller 1 internal comparator 11 output low level then controller 1, comparator 11 overturns, and forbid that IGBT drives signal
Control module 12 exports positive pulse waveform, and then closes the IGBT in IGBT module 2, it is to avoid IGBT is damaged by surge impact.
Above-mentioned voltage surge sampling module 9 includes filter capacitor C8, divider resistance R11, divider resistance R12, divider resistance
R13, flying capacitance C7, divider resistance R7, divider resistance R8, divider resistance R9, divider resistance R10 and audion Q1, wherein,
Divider resistance R7, divider resistance R8, divider resistance R9 are in parallel with flying capacitance C7 after connecting, and one sys node is voltage wave
Gushing the sampling input of sampling module 9, another sys node connects divider resistance R10 one end, the divider resistance R10 other end with
Filter capacitor C203, divider resistance R11, divider resistance R12, the sys node of divider resistance R12, the base stage of audion Q1 connects
Between divider resistance R11 and divider resistance R13, the grounded emitter of audion Q1, what controller 1 received by colelctor electrode 11 draws
Foot, its principle is: voltage surge sampling module 9 presets sampling threshold, such as a 310V, naturally it is also possible to according to specifically
Situation arranges other sampling threshold values, and when there being the surge voltage higher than sampling threshold values 310V in circuit, surge voltage is by fast
Speed electric capacity C7 one end is directly coupled to the other end, and surge voltage flows through divider resistance R10, divider resistance R11 and divider resistance R13
After, the base stage at audion Q1 connects the voltage produced on the node of divider resistance R11 and divider resistance R13 higher than audion Q1
Conducting voltage so that audion Q1 turns on, and is input to the corresponding level signal of controller and changes after audion Q1 conducting,
After corresponding pin obtains signal, controller controls IGBT and turns off, and then realizes surge protection.It is so designed that, can effectively protect system
The normal work of system, improves significantly to frequent starting surge protection problem, reduces the generation of protection by mistake.
It is appreciated that above-mentioned surge protection circuit can only arrange voltage surge sampling module or only arrange current surge
Sampling module, also can play surge sample detecting effect, and then play surge protection.
Preferably, the voltage surge sampling module 9 of the present embodiment is provided with the Half bridge rectifier being connected with rectification module 3 input
Unit, Half bridge rectifier unit is straight for the unidirectional pulsating nature that the alternating current of input is converted into DC voltage and alternating voltage mixing
Stream electricity, in order to the sampling of voltage surge sampling module 9；More preferably: this Half bridge rectifier unit includes two branch roads, and wherein one is
The diode D1 and diode D2 and be connected to L line of series connection, other one be the diode D3 and diode D3 and connection connected
To N line, two Diode series can increase back-pressure bearing value.The present embodiment diode D1, diode D2, diode D3 and two
Pole pipe D4 all uses fast recovery diode, utilizes the characteristic that its reverse recovery time is short, makes rear class voltage surge sampling module 9
Quickly response, improves sample rate, quickly to set up protection when surge occurs, reduces the risk that guard delay brings.Certainly,
In other embodiments, according to the requirement of circuit design, Half bridge rectifier unit can also use a diode, or two with
The structure of upper Diode series.
Kitchen appliance described in above example can be current conventional electromagnetic oven, electromagnetic stove, IH electric cooker, IH pressure
Pot and other similar cooking apparatus.
This utility model embodiment is applied to kitchen pressure cooking appliance, such as electric pressure cooking saucepan.
The above, detailed description of the invention the most of the present utility model, but protection domain of the present utility model does not limit to
In this, it is familiar with this those skilled in the art and should be understood that this utility model includes but not limited to accompanying drawing and specific embodiment party above
Content described in formula.Any amendment without departing from function of the present utility model and structural principle is intended to be included in claims
Scope in.
Claims (10)
1. a kitchen appliance surge protection circuit, including rectification module, controller, the IGBT module of connection controller, it is special
Levying and be, described surge protection circuit also includes the first surge absoption module for absorbing surge disturbing signal, described first
Surge absoption module is connected between rectification module and IGBT module, carries out surge suction with the voltage exporting described rectification module
Receive.
2. kitchen appliance surge protection circuit as claimed in claim 1, it is characterised in that described first surge absoption module includes
One varistor；Or described first surge absoption module includes the varistor of multiple series connection；Or described first surge
Absorption module includes the varistor of multiple parallel connection.
3. as claimed in claim 1 kitchen appliance surge protection circuit, it is characterised in that described surge protection circuit also includes the
One filtration module, described first filtration module includes that LC filter unit, the input of described LC filter unit connect the first surge
The outfan of absorption module.
4. kitchen appliance surge protection circuit as claimed in claim 1, it is characterised in that described kitchen appliance surge protection circuit
Also include the second surge absoption module for absorbing voltage surge disturbing signal, the outfan of described second surge absoption module
Connect the input of rectification module.
5. kitchen appliance surge protection circuit as claimed in claim 4, it is characterised in that described second surge absoption module includes
Varistor；Or described second surge absoption module includes varistor and strengthens the discharge tube of surge absoption function, described
Varistor and discharge tube series connection.
6. kitchen appliance surge protection circuit as claimed in claim 4, it is characterised in that described kitchen appliance surge protection circuit
Also include that the second filtration module, the outfan of described second filtration module connect the input of the second surge absoption module, be used for
The smooth voltage being input to the second surge absoption module.
7. kitchen appliance surge protection circuit as described in one of claim 1 to 6, it is characterised in that described kitchen appliance surge
Protection circuit also includes the surge sampling module for current signal and/or voltage signal sampling, and described controller is according to sampling
Current signal and/or voltage signal to IGBT module regulate to carry out surge protection.
8. as claimed in claim 7 kitchen appliance surge protection circuit, it is characterised in that described surge sampling module include for
The voltage surge sampling module of voltage sample and the current surge sampling module for current sample, described voltage surge sampling mould
The sampling input of block connects the input of rectification module, and described current surge sampling module connects the outfan of rectification module.
9. kitchen appliance surge protection circuit as claimed in claim 7, it is characterised in that described surge sampling module includes electricity
Pressure surge sampling module, described voltage surge sampling module is provided with the Half bridge rectifier unit being connected with rectification module input.
10. kitchen appliance surge protection circuit as claimed in claim 9, it is characterised in that described Half bridge rectifier unit at least wraps
Including a diode, described diode is fast recovery diode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620352865.9U CN205812425U (en) | 2016-04-25 | 2016-04-25 | A kind of kitchen appliance surge protection circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620352865.9U CN205812425U (en) | 2016-04-25 | 2016-04-25 | A kind of kitchen appliance surge protection circuit |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107172731A (en) * | 2017-05-04 | 2017-09-15 | 安徽庆睿实业有限责任公司 | Electromagnetic oven with synchronous detection function |
| CN108988291A (en) * | 2017-06-05 | 2018-12-11 | 佛山市顺德区美的电热电器制造有限公司 | Household electrical appliance and surge protective device for household electrical appliance |
| CN113079611A (en) * | 2021-04-20 | 2021-07-06 | 北京克什布科技发展有限公司 | Anti-lightning and anti-misconnection tower crane lamp |
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2016
- 2016-04-25 CN CN201620352865.9U patent/CN205812425U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107172731A (en) * | 2017-05-04 | 2017-09-15 | 安徽庆睿实业有限责任公司 | Electromagnetic oven with synchronous detection function |
| CN108988291A (en) * | 2017-06-05 | 2018-12-11 | 佛山市顺德区美的电热电器制造有限公司 | Household electrical appliance and surge protective device for household electrical appliance |
| CN113079611A (en) * | 2021-04-20 | 2021-07-06 | 北京克什布科技发展有限公司 | Anti-lightning and anti-misconnection tower crane lamp |
| CN113079611B (en) * | 2021-04-20 | 2022-12-16 | 北京克什布科技发展有限公司 | Anti-lightning and anti-misconnection tower crane lamp |
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